CN218600340U - Combined integrated air extractor - Google Patents
Combined integrated air extractor Download PDFInfo
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- CN218600340U CN218600340U CN202222505215.1U CN202222505215U CN218600340U CN 218600340 U CN218600340 U CN 218600340U CN 202222505215 U CN202222505215 U CN 202222505215U CN 218600340 U CN218600340 U CN 218600340U
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Abstract
The utility model relates to a combination integrated air ejector comprises two-stage air ejector and vapor seal air ejector, two-stage air ejector and vapor seal air ejector combination are integrative, and wherein, the aftercooler of two-stage air ejector and vapor seal air ejector merges into a cavity, forms the air ejector after the combination integration that has three cavity, admission all the way, cooling water business turn over all the way, a evacuation pipe. The combined integrated air extractor of the utility model organically combines two independent devices, the original function is kept unchanged, the system is simplified, the whole volume is reduced, the manufacturing cost is reduced, the installation is convenient, and the cabin space and the station of an operator are saved; because the number of system pipelines is reduced, the pipeline resistance is reduced, and the operating efficiency of the steam turbine is also improved. The utility model discloses can be used to boats and ships steam turbine unit, also can expand more civilian power station steam turbine unit or condensing steam type steam turbine unit.
Description
Technical Field
The utility model relates to a take out the noncondensable gas in the steam turbine condenser, maintain the high vacuum of condenser to take out the hourglass vapour/gas of steam turbine vapor seal system simultaneously, maintain the little negative pressure of steam turbine vapor seal air exhaust system, prevent the ejector that steam turbine tip steam and air leak outward.
Background
The existing steam turbine air extraction equipment generally comprises two devices, namely a two-stage air extractor and a steam seal air extractor. Because the requirements of the generated vacuum pressure are different, the two air extractors are respectively designed and installed, and the independent systems are complete. The two-stage aspirator extracts the uncondensed air and vapor mixture inside the condenser and maintains the high vacuum negative pressure inside the condenser at about 20kPa (a), see fig. 1. The steam seal air extractor is used for extracting leakage steam/gas of a steam seal system of the steam turbine and maintaining the micro negative pressure of the steam seal air extraction system to be about 90kPa (a), and the figure is shown in figure 2.
Disclosure of Invention
In order to simplify the constitution of steam turbine air exhaust system, reduce the volume of steam turbine air ejector, practice thrift manufacturing cost, reduce cabin space and occupy and personnel's operating station position, be convenient for arrange and install, the utility model provides a combination integrated air ejector.
In order to achieve the above purpose, the technical scheme of the utility model is that: a combined integrated air extractor comprises a two-stage air extractor and a steam seal air extractor, wherein the two-stage air extractor and the steam seal air extractor are combined into a whole, and a rear cooler of the two-stage air extractor and a rear cooler of the steam seal air extractor are combined into a cavity to form the combined integrated air extractor which is provided with three cavities, one path of steam inlet, one path of cooling water inlet and outlet and one evacuation pipe.
Further, the combined integrated air extractor is a steam jet air extractor, and saturated steam of 1.3MPa (a) to 2.7MPa (a) is taken as high-temperature and high-pressure working steam.
Furthermore, in the combined integrated air extractor, a condenser is connected to the condensing side of the first-stage air extractor and used for extracting air from the condenser and compressing and raising pressure, and a first-stage cooler is arranged between the first-stage air extractor and the second-stage air extractor and used for pre-cooling a steam-air mixture entering the second-stage air extractor and condensing a part of steam and discharging the steam out of the first-stage shell.
Further, the second-stage air extractor is connected with the second-stage cooler through a second-stage diffuser and is used for enabling the steam-air mixture at the outlet of the second diffuser to pass through the second-stage cooler, so that steam in the steam-air mixture is condensed and discharged out of the second-stage shell; the uncondensed air is discharged to the atmosphere through the air nozzle of the second stage housing.
Further, the second stage diffuser outlet pressure is above atmospheric pressure.
Furthermore, the steam seal air extractor adopts a mode of cooling first and then extracting air, the amount of steam and the amount of air to be extracted are the amount after cooling, the mixture after extraction enters a second-stage cooler of the vacuum air extractor for cooling, and the uncondensed air is discharged into the atmosphere through an air pipe opening of the second-stage shell.
Furthermore, the aftercooler of the combined integrated air extractor adopts condensed water provided by a condensed water pump as a cooling medium.
The beneficial effects of the utility model are that:
the utility model discloses a combination integrated form air ejector organically combines two independent equipment together, and original function remains unchanged, and the system is simplified, and whole volume reduces, has reduced manufacturing cost, simple to operate. And meanwhile, the cabin space and the standing position of an operator are saved. Because the number of system pipelines is reduced, the pipeline resistance is reduced, and the operating efficiency of the steam turbine is also improved. The utility model discloses can be used to boats and ships steam turbine unit, also can expand more civilian power station steam turbine unit or condensing steam type steam turbine unit.
Drawings
FIG. 1 is a schematic diagram of a prior art two-stage air extractor;
FIG. 2 is a schematic view of a conventional steam seal ejector;
fig. 3 is a schematic view of the combined integrated air extractor of the present invention;
fig. 4 is a schematic view of the working process of the combined integrated air extractor of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
As shown in 3,4, the utility model discloses a combination integrated air extractor comprises two-stage air extractor and vapor seal air extractor, and two-stage air extractor and vapor seal air extractor set becomes integrative, and wherein, the aftercooler of two-stage air extractor and vapor seal air extractor merges into a cavity, forms the air extractor after the combination integration that has three cavity, admission all the way, cooling water business turn over all the way, an evacuation pipe.
The utility model discloses a combination integrated form air ejector under the unchangeable prerequisite of realizing 2 kinds of vacuum pressure functions, combines former two-stage air ejector and vapor seal air ejector combination together, needs 4 cavities integration to be 3 cavities by former design, and the external interface integration, the complete matching of performance makes up the appearance structure of integrated back air ejector.
The two-stage air extractor and the steam seal air extractor have different suction pressure requirements, and the performance requirements are kept independent and unchanged. Both aftercoolers are at positive pressure and substantially the same pressure, and are combined into one chamber. Working steam is combined into 1 path of steam from 2 paths, and cooling water in the combined chamber is changed into 1 path of shared steam from 2 paths. The emptying pipe is combined into 1 from 2. The 2 independent systems originally installed respectively become 1 system.
The utility model discloses a combination integrated form air ejector uses on many types marine turboset, excellent performance satisfies unit operation requirement completely.
The utility model discloses a combination integrated form air ejector is for penetrating vapour air ejector, and the theory of operation is the highly compressed work steam of high temperature, generally gets the saturated steam of 1.3MPa (a) -2.7 MPa (a), comes out through the work nozzle and expands pressure in the mixing chamber, the pressure that equipment needs promptly. And generating high-speed airflow, introducing the steam-air mixture extracted from the equipment into the diffuser at a speed which is continuously reduced and a pressure which is gradually increased, raising the pressure of the steam-air mixture to be higher than the atmospheric pressure at the outlet of the diffuser, cooling the steam-air mixture in a post-cooler, and discharging the extracted air into the atmosphere.
The utility model discloses a working process principle of combination integrated form air ejector as follows: in the first stage air extractor on the condenser side, air is extracted from the condenser and compressed to some intermediate pressure higher than the condenser pressure but lower than atmospheric pressure, and a first stage cooler is provided between the second stage air extractors for precooling the steam-air mixture entering the second stage air extractor. When the mixture is cooled in the first stage cooler, a part of steam is condensed and discharged out of the first stage shell, the uncondensed steam-air mixture enters the second stage, the second stage air extractor works in the same principle as the first stage, but the pressure at the outlet of the diffuser of the second stage is slightly higher than the atmospheric pressure, and the steam-air mixture at the outlet of the diffuser passes through the second stage cooler, so that the steam in the steam-air mixture is condensed and discharged out of the second stage shell. The uncondensed air is discharged to the atmosphere through the air nozzle of the secondary housing.
The steam seal air extractor adopts the principle of firstly cooling and then extracting air, the amount of steam and air to be extracted are the amount after cooling, the mixture after extraction enters a second-stage cooler of the vacuum air extractor for cooling, and the uncondensed air is discharged into the atmosphere through an air pipe opening of a second-stage shell.
The combined integrated air extractor aftercooler can adopt the condensed water provided by the condensed water pump as a cooling medium, so that the heat of the working steam of the air extractor is brought back to the water supply system by the condensed water to improve the economy of the system. The working principle is schematically shown in figure 4.
Claims (7)
1. A combined integrated air extractor is characterized in that: the steam-seal type air extractor is composed of a two-stage air extractor and a steam-seal air extractor which are combined and integrated into a whole, wherein the two-stage air extractor and a rear cooler of the steam-seal air extractor are combined into a cavity, and the combined and integrated air extractor is provided with three cavities, a path of steam inlet, a path of cooling water inlet and outlet and an emptying pipe.
2. The combined integrated ejector of claim 1, wherein: the combined integrated air extractor is a steam jet air extractor, and saturated steam of 1.3MPa (a) to 2.7MPa (a) is taken as high-temperature and high-pressure working steam.
3. The combined integrated ejector of claim 1, wherein: in the combined integrated air extractor, a condenser is connected to the condensing side of the first-stage air extractor and used for extracting air from the condenser and compressing and raising pressure, and a first-stage cooler is arranged between the first-stage air extractor and the second-stage air extractor and used for pre-cooling a steam-air mixture entering the second-stage air extractor and condensing a part of steam to be discharged out of the first-stage shell.
4. The combined integrated ejector according to claim 3, wherein: the second-stage air extractor is connected with the second-stage cooler through a second-stage diffuser and is used for enabling the steam-air mixture at the outlet of the second diffuser to pass through the second-stage cooler, so that the steam in the steam-air mixture is condensed and discharged out of the second-stage shell; the uncondensed air is discharged to the atmosphere through the air nozzle of the second stage housing.
5. The combined integrated ejector of claim 4, wherein: the second stage diffuser outlet pressure is above atmospheric pressure.
6. The combined integrated ejector of claim 1, wherein: the steam seal air extractor adopts a mode of cooling first and then extracting air, the amount of steam and the amount of air to be extracted are the amount after cooling, the mixture after extraction enters a second-stage cooler of the vacuum air extractor for cooling, and the uncondensed air is discharged into the atmosphere through an air pipe orifice of a second-stage shell.
7. The combined integrated ejector of claim 1, wherein: the aftercooler of the combined integrated air extractor adopts condensed water provided by a condensed water pump as a cooling medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222505215.1U CN218600340U (en) | 2022-09-21 | 2022-09-21 | Combined integrated air extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222505215.1U CN218600340U (en) | 2022-09-21 | 2022-09-21 | Combined integrated air extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218600340U true CN218600340U (en) | 2023-03-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222505215.1U Active CN218600340U (en) | 2022-09-21 | 2022-09-21 | Combined integrated air extractor |
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| CN (1) | CN218600340U (en) |
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- 2022-09-21 CN CN202222505215.1U patent/CN218600340U/en active Active
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